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Cameron Martel

@cameronmartel.bsky.social
441 followers 278 following 104 posts

Assistant Professor at Johns Hopkins Carey Business School. Studies misinformation & inauthentic behavior online.

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Reposted by Cameron Martel
Kate Klonick @klonick.bsky.social · 04/12/2025
Holy shit. Reuters reporting that new admin instructions on visas are if you worked at a platform in trust & safety or content moderation or on fact checking or online safety at an platform you *and your loved ones* are ineligible for H-1B visa. www.reuters.com/world/us/tru...
The cable, sent to all U.S. missions on December 2, orders U.S. consular officers to review resumes or LinkedIn profiles of H-1B applicants - and family members who would be traveling with them - to see if they have worked in areas that include activities such as misinformation, disinformation, content moderation, fact-checking, compliance and online safety, among others.
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Johan Ugander @jugander.bsky.social · 12/09/2025
📣 Yale workshop, Oct 16-17! 📣 How could/should content ranking work? What's new in content moderation? How can platforms promote civility? Hosted by Yale's Institute for Foundations of Data Science (FDS). Great speakers! Submit posters by 9/22! Spread the word! yalefds.swoogo.com/socialalgori...
yalefds.swoogo.com
New Directions in Social Algorithms Research on October 16-17, 2025 at Yale University
As social media algorithms increasingly mediate social experiences, there has been a rapid increase in research on the effects of how these algorithms are configured, alternatives to engagement-centri...
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Jenny Allen @jennyallen.bsky.social · 06/08/2025
New in TiCS w @dgrand.bsky.social @gordpennycook.bsky.social It’s been ~10yrs since misinfo research exploded but our paradigms are stuck in the post-2016 “fake news” model Time for new approaches: o True/False → Content that misleads o Belief → Behavior o Eval interventions in ambiguous settings
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David Rand @dgrand.bsky.social · 17/06/2025
🚨In PNAS🚨 The right often accuses fact-checkers of political bias But we analyzed Community Notes on Musk's X and found posts flagged as "misleading" are 2.3x more likely to be written by Reps than Dems! The issue is Reps sharing misinformation, not fact-checker bias... www.pnas.org/doi/10.1073/...
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Cameron Martel @cameronmartel.bsky.social · 14/04/2025
🚨New in @plosone.org🚨 Corrections of misinfo are often ignored. What can drive engagement? Twitter field exp & survey followups find -Social ties matter: users more likely to engage w corrections from accounts who followed user -Shared partisanship had smaller effects on engagement shorturl.at/0Ycdp
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Oxford Internet Institute @oii.ox.ac.uk · 13/03/2025
In the latest episode of the OII podcast, we're tackling misinformation and polarization on social media. What's the real-world impact? How are governments responding? And what about AI and deepfakes? Listen here: podcasts.ox.ac.uk/why-social-m...
podcasts.ox.ac.uk
Why social media is the new frontier for misinformation, and what we can do about it: Professor Mohsen Mosleh and Cameron Martel
In the sixth episode of the OII Podcast, our experts discuss topics such as: * The real world impacts that arise when people increasingly identify with their political tribes online * What role govern...
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David Rand @dgrand.bsky.social · 06/03/2025
Nice blog post by @cameronmartel.bsky.social on our NHB paper showing fact-checker warnings work even for people who distrust fact-checkers. Particularly relevant re Meta's rollback of fact checking based (among other things) on claim that fact-checkers lost publics trust spsp.org/news/charact...
spsp.org
Fact-checker Warnings Are Surprisingly Effective Even For Skeptics | SPSP
Even when people distrust fact-checkers, they’re still influenced by warning labels on false news.
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Reed Orchinik @rorchinik.bsky.social · 01/02/2025
New WP! The illusory truth effect (repetition -> belief) is core to psych of beliefs, & thought to be a deep bias impacting misinfo, persuasion & advertising Why would cognition include such a flaw? We argue it is a rational adaptation to high-quality info environments 🧵1/
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David Rand @dgrand.bsky.social · 31/01/2025
🚨New WP🚨 Remember Musk+Zuck+Trump+Jordan etc crying fact-checker bias b/c Reps were flagged more than Dems? We analyzed Community Notes on Musk's X and guess what: posts flagged as "misleading" are 67% more likely to be written by Reps! The issue is Reps, not fact-checkers... osf.io/preprints/ps...
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Matt DeVerna @matthewdeverna.com · 29/01/2025
Three new articles discuss Meta’s decision to drop fact-checkers and shift to a "Community Notes" model, sparking concerns about misinformation. What's at stake? Here are three smart takes from experts. A short thread: 🧵
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David Rand @dgrand.bsky.social · 28/01/2025
🚨OpEd+data: Meta is out of step with public opinion🚨 Zuck cut moderation b/c he said people no longer want it. But he's wrong! We polled 1k Americans and most people, including majority of Reps: i) want content moderation ii) don't want Community Notes w/o fact-checkers thehill.com/opinion/tech...
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David Rand @dgrand.bsky.social · 09/12/2024
🚨New WP🚨 We examine news sharing on 7 platforms: 1)Right-leaning platforms=lower quality news 2)Echo-platforms: Right-leaning news gets more engagement on right-leaning platforms, vice-versa for left-leaning 3)But low-quality news gets more engagement EVERYWHERE, even BlueSky! osf.io/preprints/ps...
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Cameron Martel @cameronmartel.bsky.social · 16/10/2024
🚨New in JEP:G🚨 Why do ppl preferentially reciprocate follows by co-partisans online? In a Twitter field exp & online survey exp we find: -Both content *and* social prefs drive co-party tie-making -Distinct roles for in-party pref & out-party dispref dx.doi.org/10.1037/xge0...
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David Rand @dgrand.bsky.social · 02/10/2024
🚨Out in Nature!🚨 Many (eg Trump JimJordan Musk Vance) have accused social media of anti-conservative bias - but is this accurate? We test empirically, and it's more complicated than you might think: conservatives ARE suspended more, but also share more misinfo www.nature.com/articles/s41...
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Ethan Porter @ethanvporter.bsky.social · 19/09/2024
In a new article in Political Communication, @mattgraham.bsky.social and I study how to increase readership of fact-checks. It's hard! Social pressure, civic duty and small payments help; leveraging Party ID doesn't. www.tandfonline.com/doi/full/10.... Ungated: osf.io/preprints/os...
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Cameron Martel @cameronmartel.bsky.social · 18/09/2024
And here is a Research Briefing summary of our work in Nature Human Behaviour from myself & @dgrand.bsky.social : rdcu.be/dT3dq
rdcu.be
Online misinformation warning labels work despite distrust of fact-checkers
Nature Human Behaviour - Could online warning labels from fact-checkers be ineffective — or perhaps even backfire — for individuals who distrust fact-checkers? Across 21 experiments, we...
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David Rand @dgrand.bsky.social · 12/09/2024
🚨Out in Science!🚨 Conspiracy beliefs famously resist correction, ya? WRONG: We show brief convos w GPT4 reduce conspiracy beliefs by ~20%! -Lasts over 2mo -Works on entrenched beliefs -Tailored AI response rebuts specific evidence offered by believers www.science.org/doi/10.1126/...
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Brendan Nyhan @brendannyhan.bsky.social · 05/09/2024
Ungated link sites.dartmouth.edu/nyhan/files/...
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Cameron Martel @cameronmartel.bsky.social · 05/09/2024
🚨New in Nature Human Behaviour🚨 Will misinfo warning labels backfire for ppl who distrust fact-checkers? No! Labels reduce belief in & sharing of false news even for those highly distrusting of fact-checkers - warning labels are a key tool for platforms! rdcu.be/dSHtF
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Association for Psychological Science @psychscience.bsky.social · 16/07/2024
Harnessing the wisdom of high-quality online crowds could help scale up efforts to identify and intervene on #misinformation, @cameronmartel.bsky.social said.
psychologicalscience.org
Crowding Out Falsehoods
Psychological scientists are harnessing the biases and expertise of imperfect individuals to enhance the wisdom of crowds.
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David Rand @dgrand.bsky.social · 25/06/2024
📢POSTDOC OPPORTUNITY📢 Come join me Gord Pennycook and @tomcostello.bsky.social as we launch a research program using dialogues with LLMs as a tool to study human psychology and decision-making! Located at MIT or Cornell, and open applicants from all kinds of intellectual backgrounds/training!
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Ross Dahlke @rossdahlke.bsky.social · 03/06/2024
Partisans blocking counter-partisans drives polarization on Twitter, with Dems more likely to block Reps than vice versa because Dems want to block accounts that post low-quality information, finds @cameronmartel.bsky.social @mmosleh.bsky.social @dgrand.bsky.social et al. doi.org/10.1093/pnas...
Blocking of counter-partisan accounts drives political assortment on TwitterImage description
Figure 2Figure 3Figure 4
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Mohsen Mosleh @mmosleh.bsky.social · 29/05/2024
Prior work on political assortment on social networks mostly focus on "connect" to like-minded others. In our recent work, we showed "disconnect" (blocking) is also a key driver of polarized social networks. h/t @cameronmartel.bsky.social @dgrand.bsky.social Tauhid Zaman Qi yang #socialmedia
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Cameron Martel @cameronmartel.bsky.social · 28/05/2024
🚨New in PNAS Nexus🚨 Twitter field exps: -Users block counter-partisans 12x more than co-partisans -Dems block Reps more than vice-versa Survey exps: -Why block? To not see blocked user's posts -Dem/Rep diff prob bc Dems block misinfo/toxic sharers more  academic.oup.com/pnasnexus/ar...
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Cameron Martel @cameronmartel.bsky.social · 24/04/2024
🚨New review🚨 Do warning labels on misinformation actually work? In Current Opinion in Psychology, @dgrand.bsky.social & I show that the answer is YES: warnings can reduce belief & sharing by ~25-50%! We also review moderators (eg more visible=bigger effect) www.sciencedirect.com/science/arti...
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Cameron Martel @cameronmartel.bsky.social · 29/03/2024
🚨Out in Psych Sci🚨 Prompting accuracy can increase news sharing quality - but is this true for those on the political right? In an ADVERSARIAL COLLABORATION we find: ➡️ Acc prompts increase sharing quality of Republicans ➡️ Some evidence of greater efficacy for those on left v right
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David Rand @dgrand.bsky.social · 22/02/2024
🚨WP🚨 We test 9 online samples and find clear tradeoffs between attentiveness and representativeness - which sample is best depends on research q and priorities. For social/political qs I rec Bovitz/Lucid, for complex designs I rec Cloud/Prolific osf.io/preprints/ps...
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David Rand @dgrand.bsky.social · 17/11/2023
🚨New WP🚨 Intuition favors belief in false claims. But why? @rorchinik.bsky.social argues its the result of rationally adaptative intuitions adjusting to low base rate of false claims in the US media environment Check out Reed's talk at SJDM on 11/18 9:10am! PDF: osf.io/preprints/ps...
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Reed Orchinik @rorchinik.bsky.social · 26/09/2023
Very happy to share a new working paper with some great coauthors! 97% of climate scientists agree that human-caused climate change is occurring. But how do people interpret this consensus? Is it a testament to expertise or a signal of bias? psyarxiv.com/ezua5/
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